IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0994430
(2009-05-26)
|
등록번호 |
US-8557215
(2013-10-15)
|
우선권정보 |
PT-104085 (2008-05-27) |
국제출원번호 |
PCT/IB2009/052205
(2009-05-26)
|
§371/§102 date |
20101123
(20101123)
|
국제공개번호 |
WO2009/144665
(2009-12-03)
|
발명자
/ 주소 |
- Calado Da Silva, João Manuel
- Dos Santos Antunes, Elsa Marisa
|
출원인 / 주소 |
- Innovnano—Materiais Avançados, S.A.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
1 |
초록
▼
The disclosed subject concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is
The disclosed subject concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is prepared with precursors in order to present a detonation regime with temperature lower than 2000° C., and they present a high chemical and crystalline phase homogeneity, individually for each particle, as well as a set of complementary properties adjustable according to the final applications, such as a homogeneous distribution of the primary particles, very high chemical purity level, crystallite size below 50 nm, surface areas by mass unit between 25 and 500 m2/g, and true particle densities higher than 98% of the theoretical density. This set of characteristics makes this materials particularly suitable for a vast range of applications in the nanotechnology field, such as, for example, nanocoatings, magnetic nanofluids, nanocatalysts, nanosensors, nanopigments, nanoadditives, ultra light nanocomposites, drug release nanoparticles, nanomarkers, nanometric films, etc.
대표청구항
▼
1. Process for the synthesis of nanometric-sized ceramic materials, wherein the process is carried out by detonating two water-in-oil (W/O) emulsions, a first emulsion and a second emulsion, wherein the second emulsion contains a set of precursors of ceramic materials and presents a detonation regim
1. Process for the synthesis of nanometric-sized ceramic materials, wherein the process is carried out by detonating two water-in-oil (W/O) emulsions, a first emulsion and a second emulsion, wherein the second emulsion contains a set of precursors of ceramic materials and presents a detonation regime at temperatures in the point C,J (Chapman, Jouguet) lower than the ceramic nanomaterial melting point, determined from the composition and density of the emulsion by means of the state equation and numerical methods, and wherein one of the first emulsion and the second emulsion has at least one material not present in the other of the first emulsion and the second emulsion. 2. The process according to claim 1, wherein the precursors of the second emulsion comprise one or more of oxidizing agents soluble in the internal aqueous phase, fuels soluble in the internal aqueous phase, fuels miscible with the external phase, and still solid precursors. 3. The process according to claim 1, wherein the definition of the composition of the second emulsion comprises the following stages: a) defining the stoichiometry of the precursors in the mixture;b) adjusting the detonation temperature. 4. The process according to claim 1, wherein the pH of the second emulsion is acidic and lower than 5. 5. The process according to claim 1, wherein the first emulsion has the following composition: a. Ammonium Nitrate: 70 to 90%;b. Water: 5 to 20%;c. Oil: 3 to 10%;d. Emulsifying Agent: 0.5 to 2.5%;e. Organic sensitizer: 0.2 to 1%. 6. The process according to claim 1, wherein each of the first and second emulsions exhibit one or more of a spherical configuration, cylindrical configuration, plane faces configuration, and annular configuration. 7. The process according to claim 1, wherein the detonation is initiated in the first emulsion. 8. The process according to claim 1, wherein the ceramic materials exhibit: a. homogeneous distribution of primary particles between 15 and 100 nm;b. crystalline phase homogeneity, in each individual particle, higher than 90%;c. crystallite size lower than 50 nm;d. true density higher than 98% of the theoretical density;e. surface area by mass unit between 5 and 500 m2/g;f. a purity level higher than 99.99%. 9. The process according to claim 1, wherein the second emulsion further comprises as precursors oxidizing agents soluble in the internal aqueous phase, fuels soluble in the internal aqueous phase, fuels miscible with the external phase, and still solid precursors, and wherein the second emulsion has an internal phase having a pH lower than 3, a density comprised between 0.7 and 1.7 g/cm3, and a detonation regime with a reaction rate higher than 4000 m/s for a detonation temperature lower than a melting point of the ceramic nanomaterial. 10. The process according to claim 2, wherein the pH of the second emulsion is acidic and lower than 5. 11. The process according to claim 3, wherein the pH of the second emulsion is acidic and lower than 5. 12. The process according to claim 2, wherein the ceramic materials exhibit: a. homogeneous distribution of primary particles between 15 and 100 nm;b. crystalline phase homogeneity, in each individual particle, higher than 90%;c. crystallite size lower than 50 nm;d. true density higher than 98% of the theoretical density;e. surface area by mass unit between 5 and 500 m2/g;f. a purity level higher than 99.99%. 13. The process according to claim 3, wherein the ceramic materials exhibit: a. homogeneous distribution of primary particles between 15 and 100 nm;b. crystalline phase homogeneity, in each individual particle, higher than 90%;c. crystallite size lower than 50 nm;d. true density higher than 98% of the theoretical density;e. surface area by mass unit between 5 and 500 m2/g;f. a purity level higher than 99.99%. 14. The process according to claim 5, wherein the ceramic materials exhibit: a. homogeneous distribution of primary particles between 15 and 100 nm;b. crystalline phase homogeneity, in each individual particle, higher than 90%;c. crystallite size lower than 50 nm;d. true density higher than 98% of the theoretical density;e. surface area by mass unit between 5 and 500 m2/g;f. a purity level higher than 99.99%. 15. A process for the synthesis of nanometric-sized ceramic materials, wherein the process is carried out by detonating two water-in-oil (W/O) emulsions, a first emulsion and a second emulsion, wherein the second emulsion contains a set of precursors of ceramic materials and presents a detonation regime at temperatures in the point C,J (Chapman, Jouguet) lower than the ceramic nanomaterial melting point, determined from the composition and density of the emulsion by means of the state equation and numerical methods, wherein the first emulsion has the following composition: a. Ammonium Nitrate: 70 to 90%;b. Water: 5 to 20%;c. Oil: 3 to 10%;d. Emulsifying Agent: 0.5 to 2.5%;e. Organic sensitizer: 0.2 to 1%. 16. The process according to claim 15, wherein the ceramic materials exhibit: a. homogeneous distribution of primary particles between 15 and 100 nm;b. crystalline phase homogeneity, in each individual particle, higher than 90%;c. crystallite size lower than 50 nm;d. true density higher than 98% of the theoretical density;e. surface area by mass unit between 5 and 500 m2/g;f. a purity level higher than 99.99%.
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